Textile belting and method of preparing the same.



WTED rdTr i ll PAZRENT nanny er. L. Brennan,

0F WOLLASTON, IVIASSACHUSETTES.

TEXTILE BEE-TING AND METHOD OFPBEPARING THE SAME.

No Drawing.

To all whom it may concern:

. Be it known that l. HARRY ST. L. -BUCI{- flexible; lubricating the fibers to prevent internal wear and access of moisture; preventing the expansion and contraction due to changes in atmospheric conditions, and producing a surface that will have a tendency to prevent slippage and give more uniform transmission of power.

I have discovered that products of the above mentioned kinds are greatly improved in several respects by certain treatment which I will describe, and l have discovered especially that the Wear and breaking down of these products isdue largely to the fact that as these products turn around pulleys or the like, often first one Way and then the other, their interior particles rub against each other and wear each other out, and that by treating them by this process a very large proportion of their wear can be re duced. also the fibers protected from moisture.

These results I secure by treating the belting or the like with a mixture of two petroleum products, viz: a heavy oil asphalt and a lubricating oil from the same base.

I will describe one particular way of carrying out this process which has proved practical and the best way now known to me. The products used for treating-fabrics described above are as follows:

a. Refined oil asphalthaving the follow ing specifications S ecific gravity at .99103 citing point -130 F. Ductility in centimeters. 150 Penetration at 7 7 F. (in tenths of a millimeter) L. l 440 Penetration at 32 F. 1n tenths of a millimeter) 42 Penetration at 115 F Too soft Specification oi' Letters Patent.

Patented Dee. 4t, trait.

Application filed December 18, 1916. Serial No. 137,?16.

Evaporation.-7 hours at F Lava-2.5% Flash (Cleveland open cup)" 420-ft70 F. Fire test 520-560 Sol. car. bisulfid -l 99% Sol. car. tetra bcn Sol. 88 B6. Penn. naphthzn--- 73-7ll% Z). Refined asphaltic base lubricating oil having approximately the following specification (laravity .19 Flash a 330 Fire test 380 F. Vis. at 100 F 390 A homogeneous mixture of substantially equal quantities by weight of the above mentioned products is made by heating the mirtture to a temperature of approximately 200" i. At the same time the products are agi tated so that they will be thoroughlyassimilated. This gives a compounded product having a viscosity of approximtaely 196 to 2200 at 210 F.

The belting or tapes or other textile prod" nets in a dry state are immersed in a. bath containing this mixture thinned. preferably by heating up to the temperature abs specified, and after being allowed to rem: in a suliicient time at that temperature to secure a perfect penetration they are. then put through rollers having a suilicicnt pressure to squeeze out the excess material. The thickness and hardness of the strands of the textile material determines the length time necessary to secure complete satur a tion. For instance, cotton fibers having a very hard twist and closely Woven take a longer time than a loosely twisted, loosely Woven fabric.

Then the belt or the like is coated with any suitable finishing material. such as ordinary paint. This serves as means for retaining the saturating compound in and on the fabric and eliminates stickiness of sun taco until the time same is put in service. It also gives it a better appearance. t is to be remembered that the material I usefor coating is not capable of penetrating is.

thoroughly into the fabric. It however leaves the surface in condition so that the finished product can be handled without difiiculty.

The mixture of two petroleum asphaltic bee duets cue heavy and the other light 1y specified above is an imporre o this invention, because, ullily mixed, still the light one penetrritive powers and rries ier end more stable component with -o the most remote interstices of the brie. some of the other one with it so that no l di erence is seen in the composil'hc surface and interior thereof two products from ti '3 sumo usphaltic b: to lih 'ent ellinity between them so that no tendency toward. sclmrution of the t zvo ingredients is obselved. have fouuu in practice that a belt so treated more duroble as well as flexible, than one treue With tor or linseed oil mixture, or the like in the ordinary wagy.

Although I prefer to use lubricating oil substantially as specified above for the purpose of diluting the base material, it is i also to use other petroleum distili ()1? course, the particular asphalt men oned above may be replaced by subll equivulent asphalt of other densities within the scope of this invention. 'lfhereime I do not wish to be limited to the precise composition as specified, but what i claim is:

. '1 method oi treating textile belting,

*- tepes and bends, and the like, which in satu ating the same with mix- The heavier substance also holds iz teem ture of oil asphalt and refined petroleum distillate.

2. The method of treating textile belting.

ture of refined oil asphalt and refined pe-' troleum distillate, in substantially equal proportions by Weight, removing the excess and painting the surface.

l. 'lhe method of treating textile belting, driving tapes; ind bands, and thelike, which consists in saturating the same with a mixture of oil asphalt and asphaltic base lubricating oil by immersing therein while heated to a temperature of about 200 F.

5. As an article of manufacture, a belt of textile material having its fibers saturated with a mixture of refined oil asphalt and refined usphull'ic lubricating oil.

As in article of manufacture, a belt of textile nuiteiriul having its fibers impregnated with 2]; mixture of refined oil asphalt and e petroleum distillate.

In testimony whereof I have hereunt allixed my signature.

HARRY ST. L. BUCHNER till 

